Alessandro Marchetti


2013

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Semeval-2013 Task 8: Cross-lingual Textual Entailment for Content Synchronization
Matteo Negri | Alessandro Marchetti | Yashar Mehdad | Luisa Bentivogli | Danilo Giampiccolo
Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 2: Proceedings of the Seventh International Workshop on Semantic Evaluation (SemEval 2013)

2012

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Chinese Whispers: Cooperative Paraphrase Acquisition
Matteo Negri | Yashar Mehdad | Alessandro Marchetti | Danilo Giampiccolo | Luisa Bentivogli
Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC'12)

We present a framework for the acquisition of sentential paraphrases based on crowdsourcing. The proposed method maximizes the lexical divergence between an original sentence s and its valid paraphrases by running a sequence of paraphrasing jobs carried out by a crowd of non-expert workers. Instead of collecting direct paraphrases of s, at each step of the sequence workers manipulate semantically equivalent reformulations produced in the previous round. We applied this method to paraphrase English sentences extracted from Wikipedia. Our results show that, keeping at each round n the most promising paraphrases (i.e. the more lexically dissimilar from those acquired at round n-1), the monotonic increase of divergence allows to collect good-quality paraphrases in a cost-effective manner.

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Semeval-2012 Task 8: Cross-lingual Textual Entailment for Content Synchronization
Matteo Negri | Alessandro Marchetti | Yashar Mehdad | Luisa Bentivogli | Danilo Giampiccolo
*SEM 2012: The First Joint Conference on Lexical and Computational Semantics – Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation (SemEval 2012)

2011

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Divide and Conquer: Crowdsourcing the Creation of Cross-Lingual Textual Entailment Corpora
Matteo Negri | Luisa Bentivogli | Yashar Mehdad | Danilo Giampiccolo | Alessandro Marchetti
Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing

2010

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Extending English ACE 2005 Corpus Annotation with Ground-truth Links to Wikipedia
Luisa Bentivogli | Pamela Forner | Claudio Giuliano | Alessandro Marchetti | Emanuele Pianta | Kateryna Tymoshenko
Proceedings of the 2nd Workshop on The People’s Web Meets NLP: Collaboratively Constructed Semantic Resources